not-yet-known not-yet-known not-yet-known unknown Figure 9: a) Voc vs time curves of commercial capacitors (47 μF, 470 μF, 1000 μF) charged by individual WS-WEG devices. b) Power density of WS-WEG device with varied external loads. c) Current density VS voltage and power density VS voltage of WS-WEG device. d) Voc for scaling up of WS-WEG in series. e) Demonstration of four WS-H+ units connected in series for Voc. f) Photograph of the LCD calculator turned on by the WS-H+. g) Overview of the comparison of output Voltage of this work with similar evaporation driven WEG devices in the reference.[18,43,62,63-76] It is proven that this bio-based nutshell-based WEG device can effectively harness sufficient energy with the utilization of small drops of water, salt water, and acid, or alkaline solutions. Therefore, this cost-effective device might be employed to harness energy from various practical sources such as rainwater, seawater, alkaline waste, and so on. This analysis validates the possibilities of utilization of green engineering techniques to overcome the sustainable energy crisis. In summary, this fundamental study proves the possibilities of cost-efficient green energy generation from organic waste materials that promote the significant advancement of WEG devices.